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No, You do not need to remove the oil pan to replace the timing chain.

I don't know why you think the timing chain needs replaced. But I would make Darn sure that it does before you tear it down and do all that work for nothing.

The timing chains on todays engine normally will out last the engine.

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Q: Is it necessary to remove oil pan to replace timing chain on a 2003 4.8 Chevy engine?
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